Ignition-dynamo.



C. T. MASON.

IGNITION DYNAMO.

APPLICAILON FILED APP..,19.

Patented Mar. 25, 1919'.

2 SHEETST'FSHEET I.

314-021 01; fiar/zsf mason C.T.MASON.I

Patented Mar. 25,1919

2 SHEETS-SHEET 2.

gnvmlfoz Char/c: s T/7as on UNITED STATES PATENT OFFICE.

CHARLES THOMAS MASON, OF SUM'I'ER, SO

UTH CAROLINA, ASSIGNOR TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEWJERSEY, A CORPORATION OF NEW JERSEY.

IGNITION-DYNAMIC.

Specification of Letters Patent.

Patented Mar. 25, 1919.

Application filed April 19, 1916. Serial No. 92,196.

To all whom it may concern:

Be it known that I, CHARLES THOMAS Mason, a citizen of the UnitedStates, resid: ing at Sumter, in the county of Sumter and State of SouthCarolina, have invented certain new and useful Improvements in Ignition-Dynamos, of which the following is a specification, reference beinghad to the accompanying drawing.

This invention relates to ignition dynamos commonly termed magnetos, andmore specifically to the manner of mounting the generating winding orcoil, and to bringing out from said coil the high tension currentgenerated therein so that same may be led to a spark plug.

One of the main objects of my invention is to arrange the hightensionconnection, or terminal, as it is usually termed, so that it maybe easily and cheaply manufactured, and so it may be used on either sideof the machine.

I also disclose a novel method of mounting the condenser commonly usedin magnetos, whereby all wires are eliminated, the condenser beingattached directl to the circuit by means of metal terminals ormingclamps for mechanically holding said condenser to its supportingframe-work.

There are other objects as will hereinafter ap car.

11 the accompanying drawing, Figure 1 is an end view with part of theside of the magneto broken away to show the arrangement of the hightension terminal and the overlapping side plates whereby the magnets areclamped to the base; Fig. 2 is a side view with one of the cover platesremoved; Fig. 3, a sectional view of the high tension terminal; Fig. 4is a diagram of the electrical circuit and connections. Like figures ofreference denote the same parts wherever they are shown.

My invention may be used with various types of magnetos, but for thesake of illusbent around the field magnet or magnets 2 and secured tothe base 3 in any suitable manner such as by the screws indicated at 4and 5. This cover, together with the side plates 6 and 7, completelyinclose the magneto with the exception of the usual interruptermechanism indicated at 29, 29 in the diagram, which is inclosed by thecap 8 held in position by a suitable cover spring 9 supported on thepost 10.

The two cover platesare bolted together by through-bolts, indicated at11 and 12, or 1n any suitable manner, and are secured to the base byscrewsvl2 and 12'. These cover plates have fianges as shown partly insect1on in the upper right hand corner of Fig. 1, adapted to overlap theedges of the magnets, thereby clamping the same to the base.

On the side plate is mounted a metal stamping 13 having the insulatingmember 14 carrymg the metal piece 15, in one end of which is placed asuitable contact brush adapted to bridge across the pole pieces, one

of which is shown at 23. These pole pieces and the base and rotorhousing all form the means for supporting the coil, and may be of anysuitable form to accomplish the result of changing the flux flow throughcore 22 when the shaft of the magneto is revolved or oscillated. Theheads of the coil are of insulating material, and upon one of them 21,is carried the terminal 24 to which one end 25 of the primary winding isconnected. The other end of the primary winding is grounded on the core22. I

The primary terminal 24 is connected by means of the clip 26 to acondenser 27, the remaining terminal 28 of which connects to the base 3.These solid metal cli s eliminate the use of wires in this circuit.conductor 29 is also connected to terminal 24 and runs to one of thecontact points 29 in the in terrupter.

One end of the secondary Winding is connected to the core, 22 and theremaining end to a terminal piece 30 placed across the heads of the coiland secured in any suitable manner, and it will be seen that spark gapsexist between the points 31 and 32 of said terminal and the uppersurface. of the ends of the core 22.

Brush 16 is so positioned as to engage terminal 30 on either end, andtherefore the high tension current is conducted out of the machine, asshown in Fig. 1, it being possible to place the terminal on either sideof the machine, a great convenience in commercial use.

By removing the bolts 11 and 12 holding the side cover plates inposition, it is obvious that the entire high tension terminal may beremoved, together with the side plates, thereby permitting easy accessto the condenser or coil terminals, and that by arranging the condenserin the manner shown all sliding or flexible contacts in the primarycircuit are eliminated, the condenser circuit connecting directly bymeans of solid metallic clips to the frame of the machine and theprimary circuit terminal respectively.

The diagram, Fig. at shows the circuit resulting from the arrangement ofparts as just described. The entire absence of all wiring between thevarious parts will be noted, the only wire being conductor 29 be-- tweenprimary terminal 24 and one of the interrupter contacts 29.

I locate the condenser so that it forms the circuit connection betweenthe primary winding and the frame of the machine, and it is thislocation and arrangement in combination with the other parts thatconstitute one of the features herein claimed by me.

The operation of a magneto of this description being well known, I donot describe the same, nor do I describe the obvious modifications whichcan be made without departing from the appended claims.

I have employed the term terminal in the foregoing description of myinvention to the several elements constituting the high tensionconnection, and particularly to designate the parts 13, 14, 15, 16 and17 forming the detachable terminal for the cable 19, and. it will beunderstood that the word terminal in the appended clain'is is employedto designate, and refers to the group of partsaforesaid, constituting aunit member detachable from the magneto as described.

Having thus described my invention, I claim 1. In an ignition dynamo, arotor, bearing supports therefor, generating windings, a stationary coretherefor, means supporting said core, a magnet extending over and inclosing said windings with its ends resting dependently thereof.

2. In an ignition dynamo, a'rotor, bearing supports therefor, generatingwindings, a stationary core therefor, means supporting said core, amagnet extending over and inclosing said windingswith its ends restingupon said core-supporting means, a cover around said magnet, side platesseparate from said bearing supports covering the lateral openingsbeneath the magnet and in engagement with said cover on its lateraledges, and a ternnnal having a portion adapted to receive a conductorexternal said cover and side plates removably connected tosaid windings,and supported independently thereof.

3. In an ignition dynamo, a. rotor, a base, an inverted U-shaped fieldmagnet supported on said base, stationary generating windings inclosedby said field magnet and mounted above said rotor, side plates securedto the base and fitting over the edges of the field magnets so as toclamp the same securely to the base and at the same time completelyinclose said rotor and generating windings, and a circuit terminalcarried by one of said side plates and removably connected to saidwindings.

4. In an ignition dynamo, a rotor, a base, an inverted U-shaped magnetstructure supported thereon to form a bridge, stationary generatingwindings within and beneath the bridge, and supported above said rotor,side plates secured to said base and extending up into overlappingengagement with the magnet structure so as to clamp the same to thebase, and a circuit terminal carried by one of said side plates andremovably connected to said generating windings.

In an ignition dynamo, a rotor, a base, an inverted ,U-shaped magnetstructure supported thereon to form a bridge, stationary generatingwindings within and between the bridge and supported above said rotor,non-magnetic metal side plates secured to the base and extending up intooverlapping engagement with the upper part of the magnet structure so asto close the open space beneath the bri .lge, and a circuit terminalcarried by one of said side plates and re movably connected to saidgenerating Windings.

(3. An ignition dynamo comprising a base, magnets supported thereon,stationary generating windings supported within said magnets, a. pair offlanged cover plates secured. to the base and extending over both sidesof the magnets with their flanges overlapping the edges thereof, and acircuit terminal carried by one of said side plates and removablyconnected to said generating windings.

7. In an ignition dynamo, a base, a magnetic field structure supportedon said base, a rotor, stationary windings inclosed within the spaceabove said rotor within said field structure, covers or closures forsaid space extending across the field structure on each side and securedtogether, and a terminal carried by one of said covers and removablyconnected to said stationary windings.

8. In an ignition dynamo, U-shaped field magnets, a stationarygenerating coil, side plates closing the open U space beneath saidfieldmagnets, a circuit terminal carried on one of said side plates andconnecting with said generating coil, and a metallic member carried onsaid coil and forming with the core thereof a spark gap of definitedimension for limiting the operative potential generated in said coil,substantially as described.

9. In an ignition dynamo, a field magnet structure, plates covering thesides thereof so as to inclose a space, a terminal member mounted on oneof said plates, a stationary generating coil having a core mountedwithin said space between the side plates and having a connection tosaid terminal member and a member forming one element of a safety sparkgap carried by said coil, substantially as described.

10. In an ignition dynamo, generating windings, a core supporting saidwindings, heads on said core, a high tension terminal spanning saidheads and secured thereto, means supporting said core, a magnetextending over and inclosing all said parts with its ends resting uponsaid means, plates clamped to the magnet and covering the lateralopening beneath the same, and a circuit terminal carried by'one of saidplates and insulated therefrom and connecting with said high tensionterminal.

11. In an ignition dynamo,a generating winding, a high tension terminalon said winding having two contact ends, means supporting said winding,a magnet extending over and inclosing said winding wlth its ends restingupon said means, and a side plate adapted to cover one of the lateral oenings beneath the magnet and having a clrcuit terminal carried thereonadapted to engage said high tension terminal at either end,substantially as described.

12. In an ignition dynamo, a coil-carrying structure, a coil on saidstructure having insulating heads, a circuit terminal on one of saidheads, a connection between said circuit terminal and said coil-carryingstructure, said connection comprising a condenser having rigid metallicterminals forming denser having rigid metallic terminals and forming aconnection between said circuit terminal and said coil-carryingstructure, a high tension terminal carried by said coil and having endportions forming contact surfaces, side plates covering the openings inthe closed figure formed by said permanent magnets, and a circuitterminal on one of said plates and engaging the said high tensionterminal, substantially as described. 14. In an ignition dynamo, a fixedsup port, a core carried thereon, a stationary generating winding onsaid core, heads on said winding, and high tension terminal memberssecured across said heads and supported thereby and forming a limitingspark gap with said core.

15. In an ignition dynamo, a fixed support, a core, a stationarygenerating winding carried thereby, a high tension terminal on saidwinding and forming a limiting spark gap with the core thereof, aprimary terminal, and a condenser having rigid metal terminals secureddirectly to said primary terminal and said support, whereby saidcondenser is mechanically supported as well as electrically connected.

16. In an ignition dynamo, generating windings, a core therefor, headson said windings, and a conducting member secured to said heads andadapted to be engaged at either end by a circuit terminal, whereby thecurrent generated may be conveyed out of either side of the dynamo.

17. In an ignition dynamo, primary and secondary windings, a coretherefor, heads on said windings, a terminal for one end of saidsecondary winding on both heads, and a circuit terminal mountedexteriorly of said dynamo and adapted to be placed in contact with saidfirst terminal, at either end thereof.

18. In an ignition dynamo, a rotor, U- shaped field magnets, astationary generating coil, side plates closing the open space beneathsaid field magnets, a circuit terminal carried on one of said sideplates and connecting with said generating coil, and a high potentialterminal member carried on said coil and forming with a metallic part ofsaid dynamo a spark gap for limiting the operative potential,substantially as described.

19. In an ignition dynamo, a fixed support, a generating winding carriedthereby,

heads on said Winding, and high tension terminal members secured to saidheads and forming a limiting spark gap with a part of said dynamo.

20. In an ignition dynamo, a fixed support, a generating Winding carriedthereby, a high tension terminal on said Winding adapted to form alimiting spark gap with some metallic portion of the dynamo, a primaryterminal on said winding, and a con I0 denser having metal terminalssecured directly to said primary. terminal and said support.

In testimony whereof I hereunto affix my signature.

CHARLES THOMAS MASON.

